The Wales full-back admitted he remembered very little after being forced off with a head injury in the first-half of the 33-28 defeat to Australia 12 days ago which also resulted in Halfpenny missing last week’s 17-13 victory over Fiji.

Now the 25-year-old has taken us behind the scenes to explain the rigorous process he and other players have to go through before they can allowed to return to action.

The tests he describes might sound like an American drink-driving side of the road examination. But they are, in fact, the rigorous concussion cognitive tests introduced by elite rugby to ensure player safety.